WO1986003600A1 - Procede de reglage automatique de la nettete et appareil photographique avec regulateur automatique de la nettete - Google Patents

Procede de reglage automatique de la nettete et appareil photographique avec regulateur automatique de la nettete Download PDF

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Publication number
WO1986003600A1
WO1986003600A1 PCT/JP1985/000666 JP8500666W WO8603600A1 WO 1986003600 A1 WO1986003600 A1 WO 1986003600A1 JP 8500666 W JP8500666 W JP 8500666W WO 8603600 A1 WO8603600 A1 WO 8603600A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
photographing
motor
camera
position determining
Prior art date
Application number
PCT/JP1985/000666
Other languages
English (en)
Japanese (ja)
Inventor
Minoru Yamada
Eiji Ito
Kenji Miyama
Masataka Sawamura
Yasushi Hoshino
Masamori Makino
Original Assignee
Konishiroku Photo Industry Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP18445084U external-priority patent/JPH0238268Y2/ja
Priority claimed from JP25687084A external-priority patent/JPH0248095B2/ja
Priority claimed from JP25687284A external-priority patent/JPS61133933A/ja
Priority claimed from JP25811484A external-priority patent/JPS61134718A/ja
Priority claimed from JP8832285A external-priority patent/JPS61245145A/ja
Priority claimed from JP9339485A external-priority patent/JPS61251813A/ja
Application filed by Konishiroku Photo Industry Co., Ltd. filed Critical Konishiroku Photo Industry Co., Ltd.
Priority to DE8686900235T priority Critical patent/DE3587018T2/de
Publication of WO1986003600A1 publication Critical patent/WO1986003600A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens

Definitions

  • the present invention relates to an automatic focus adjustment method for a force camera that operates a shooting lens to an in-focus position based on a distance measurement signal, and a camera provided with an automatic focus adjustment device.
  • a so-called step camera member which has a step in the direction of the optical axis on the end surface of a cylinder, is rotated about the optical axis, and the camera lens is rotated by the step.
  • a method of giving a lens displacement in the optical axis direction has been adopted.
  • the simplest structure is to use the above-mentioned step as a continuous cam surface and press the shooting lens against the cam surface with a spring member, and follow the rotation of the cam member so that the shooting lens moves in the optical axis direction.
  • a spring member for example, a spring member that allows them to advance and retreat.
  • a lens driving member with a cam groove for moving the shooting lens in the optical axis direction is provided separately from the step cam member, and the step cam member is rotated to the position where the shooting lens should be moved After stopping, the lens drive member is actuated to press the photographing lens against the step cam member, that is, the step cam member moves to the lens position.
  • a structure used only as a positioning member has been considered.
  • a spring member for urging the photographing lens in the direction of the optical axis is not required, and the load on the power source is reduced accordingly.
  • it has an excellent durability because it does not involve sliding friction, it operates the lens positioning member to set the position of the taking lens and the lens drive member that presses the taking lens to the set position. This has the downside that the time required for automatic focus adjustment is long because the series is driven by the series.
  • the focusing position (focus position) on the optical axis of the photographing lens is short when the subject is close to the reference position, but the distance from the reference position is short. If is far, the distance becomes longer. Therefore, depending on the distance to the subject, that is, depending on the result of distance measurement, the amount of movement of the taking lens differs, and the time for automatic focus adjustment is different. There is fear of camera shake.
  • a so-called step cam member with a step in the optical axis direction formed on the end surface of the cylindrical part, and separately from this, the photographing lens is moved in the optical axis direction to abut the step of the step part neo.
  • the driving member is then rotated, and the spiral force groove on the peripheral surface thereof is illuminated.
  • the photographic lens is set to the in-focus position. That is, the pin of the photographing lens is supported in a state where it is constrained by both the straight groove in the light direction provided in the fixed part of the lens barrel and the above-mentioned spiral cam groove, and the lens drive is performed.
  • the city material rotates, it slides on the slope of the spiral cam groove and is moved in the optical axis direction by the component force.
  • the pin of the imaging lens frame is a force that comes into contact with the step cam that has already stopped due to the component force of the surface of the rotating spiral cam groove.
  • the inclination angle of the cam groove is relatively small. Due to the wedge effect, a large frictional force is generated, and the slope of the groove cam tends to be strongly pressed against the pin of the imaging lens frame.
  • a two-focal-length photographing optical system in which the focal length can be switched between long and short two steps by a common optical system generally consists of a main lens for photography and a conversion lens, and both are combined. Therefore, the barrel is formed to obtain a long focal length by using the main lens for photographing without the conversion lens.
  • the switching operation of the shadow optics is performed by moving a lens barrel called a camera lens housing the above-mentioned main lens for shooting and a conversion lens together with a camera lens. It is usually done by pulling out or collapsing from the body.
  • the above-mentioned camera lens unit may incorporate various members for operating and controlling the main lens for photographing to a focusing position.
  • the power transmission mechanism functions to follow the movement of the main lens for photography. Requirements, the structure is complicated, and the transmission distance is long. As a result, a reduction in operating efficiency is inevitable.
  • the object of the invention is to minimize the time required for focus adjustment in an automatic focusing device for a photographing lens in which a member for constructing the lens and a member for determining the position of the lens are separately provided.
  • the aim is to reduce the burden of power and reduce the burden of power so that accurate shutter timing can be obtained for shooting.
  • the cam groove of the lens driving member which slidably slides the guide lens of the photographing lens that moves straight in the optical axis direction, is attached to the step cam of the lens positioning member.
  • the guide groove is provided at a position slightly apart in the direction of the beam and in the direction of the beam, and the start portion of the cam groove is extended in the circumferential direction, and the guide pin is held at the end of the groove.
  • the shooting lens is configured not to move in the light beam direction. It moves the lens to the lens i!
  • the lens driving member and the lens driving member are formed such that the groove force and the lens positioning step force are formed substantially in a zigzag manner, and the lens positioning determining step force precedes the lens driving groove cam.
  • Another object of the invention is to reduce the required time by making the required operating time until focusing of the photographing lens constant regardless of the distance measurement result. Is to provide LA.
  • a step cam in which a plurality of steps are formed corresponding to a plurality of focusing positions, a distance measurement of the steps of the step cam is performed, a selecting device for selecting differently, a. Pressing mechanism that presses the photographing lens to the selected step of the cam of the notch fc is provided.
  • the time required for the selection operation of the mark selection mechanism is long, and the time required for the selection operation is short, and the time is short. To the camera for which the time is set More achievable.
  • Another object of the present invention is to provide a focus adjustment method for forming a photographing lens at its focal position by separately operating a means for driving the lens and a means for determining the position of the lens.
  • the time required for focus adjustment should be minimized so that accurate shutter timing can be obtained for shooting.
  • the above object of the present invention is to provide a cam groove of a lens control member, which is coupled with a guide pin of a photographing lens which is straightly moved in the optical axis direction, to a step force for lens positioning.
  • a lens control member which is coupled with a guide pin of a photographing lens which is straightly moved in the optical axis direction, to a step force for lens positioning.
  • it is provided at a position slightly separated from the light in the direction of the light, and the two are operated as a selector so that the surface rotation of the step cam and the shooting lens can be performed at the same time.
  • the lens driving member is actuated to immediately press the pin of the photographing lens against the step cam to adjust the focus.
  • Activate the lens body gi and the lens positioning part almost simultaneously, stop the lens positioning part *, and then move the lens drive to the position determined by the lens positioning material. Focus adjusting method characterized by stopping motion member Achieved.
  • Another object of the invention is to provide a lens for driving a lens and a positioning lens for the lens in a self-propelled focusing device for a photographing lens.
  • the aim is to minimize shooting time and obtain accurate shutter timing for shooting.
  • Takishiaki The purpose of Takishiaki is to simultaneously start the combined lens guide moving member and the lens deciding member by the motor, and store the lens position decision in the control pack.
  • the electromagnetic device When the lens is rotated by the angle corresponding to the distance information, the electromagnetic device is activated to release the engagement with the lens driving member, and after stopping the lens position determination, a slight * The most shadow lens is set to the in-focus position by the connection of the lens drive member. This is because the lens positioning member goes through the stage of release-movement-grandchild, and the automatic focus adjustment device that sets the lens to the position corresponding to the ranging signal releases and locks the grandson.
  • an automatic focusing device characterized in that a stable electromagnetic device is used as a means for performing this.
  • Another object of the invention of the present invention is to solve the problem and improve the result.
  • a camera focusing device capable of reliably returning the taking lens to its initial position even with the power of a small motor is provided. Let's try.
  • the lens is moved in the forward direction by the movement of the motor, brought into contact with the stop material, stopped, and then moved in the backward direction to return the lens to the initial position.
  • a signal for moving the lens in the forward direction is temporarily given to the motor. Achieved.
  • Another object of the invention is to enable a motor as a power source for a focusing operation in a bifocal camera to be disposed in a movable lens unit, thereby saving labor.
  • the aim is to make the organization more effective and effective.
  • the purpose of the invention is to accommodate the motor in a space where a space is occupied by the conversion lens unit in the mirror of the movable lens unit, and thereby the motor is accommodated.
  • the motor is arranged at a fixed distance close to the main lens for photography, and the rear lens unit enters and exits the optical path to form a bifocal camera.
  • a lens driving motor is arranged outside the optical path for photographing the rear lens unit using a gap formed by the arrangement of the rear lens unit.
  • Fig. 2 (a) and (b) are views of the capital city.
  • Fig. 3 and Fig. 4 are timing charts showing the operation of the device. Yart.
  • Fig. 5 *: Perspective view of the movable lens unit of the bifocal camera of the invention.
  • Fig. 6 is a sectional view taken along line VI-VI in Fig. 5
  • Fig. 7 is a sectional view taken along line VII-VI in Fig. 5
  • Fig. 8 is an exploded perspective view of the automatic focusing device.
  • Fig. 9 shows the operation sequence of the focusing device according to the invention.
  • Fig. 10 shows the W road of the equipment.
  • FIGS. 1, 2), (b) and FIG. 3 show one embodiment of the self-employed focusing device of the present invention.
  • Fig. 1 shows the components of the device in neo-developed form in the direction of the optical axis.
  • the components are assembled as a unit in the lens barrel of the camera, and a power supply control is provided on the camera side.
  • the electromagnetic unit which is driven and controlled by a torch device, is a fixed electromagnetic unit in the mirror.
  • the first movable coil member that controls the exposure of the photographic lens (Fig. (Not shown)
  • a second movable coil member 12 provided with a regulation pin 11 for regulating ⁇ " is housed in a state in which the surface is protruded from the surface with light as a center.
  • flange 2 (3 is a lens guide attached to the front of the electromagnetic unit 10 and is composed of a flange-capital 2]. And a cylindrical capital 26.
  • the flange 21 is connected to the control device described above.
  • a print plate 22 having a detection pattern for transmitting the position information and a stop claw 24 which is urged clockwise by a tension spring 23 are mounted on the shaft.
  • -up pawl 2 4 rotates in the clockwise direction receives the Magotome operation of the regulating pin 11 of penetrating the flange portion 21 conductive ⁇ Yuni' bets 10 are sealed H Dan.
  • three rectilinear grooves 27 are provided on the peripheral surface of the cylindrical portion 26 at equal intervals in the light beam direction, and the gun pin 51 of the photographing lens 50 which is fitted in the same direction so as to be able to fit in the same direction. Into each other to keep the lens 50 forward and backward in the light direction. I have .
  • Reference numeral 40 denotes a lens drive unit * rotatably fitted to the outer periphery of the cylindrical portion 26 of the lens guide 20, and a three-thick cam groove 42 provided in the cylindrical portion 41 has the aforementioned guide of the photographing lens 50.
  • the lens 51 is inserted into each of them, and cooperates with the rectilinear groove 27 to regulate the rectilinear position of the photographing lens 50.
  • the reversal for the lenses driving member 40 is Menten its return from the position shown by the pinion down 61 of the motor 60 via the Ha ⁇ unit component 47 provided in the flange Metropolitan 4 6 clockwise is De ⁇ Ru It has become.
  • Numeral 30 denotes a lens positioning means for externally fitting to the cylindrical portion 41 of the lens driving member 40.
  • the guide lens 51 of the photographing lens 50 is brought into contact with the end surface of the lens driving member 40 to thereby fix the photographing lens 50 to a predetermined position.
  • the step force 31 for setting the focus position is provided at three positions corresponding to the guy K 'pin 51.
  • the lens positioning part ⁇ "30 and the lens driving member 40 are connected to each other by the tip of a pressing spring 33 attached to the projection 32 of the lens positioning member 30.
  • the V-shaped cutouts provided in the portion 46 are integrated by being joined together by the V-shaped notch, so that the motors 60 are rotated at a time.
  • the cam groove 42 of the lens driving section 40 is arranged substantially in line with the step cam 31 of the lens A determination box 30, and the groove cam 42 is It is assumed that the guide pin 51 of the regulated photographing lens 50 is provided slightly apart from W. The guide pin 51 does not contact the step cam 31.
  • a contact piece 35 is attached to the other protrusion 34 of the lens positioning member 30.
  • the contact piece 35 is intermittently formed on the fly board 22 of the lens guide 20 according to the rotation of the lens driving member 40.
  • a pulse signal is sent to the control device by sliding on the 1W road pattern, and the stop which is operated by a signal from the control device in other cases.
  • the claw 24 and the claw teeth 36 to be grandchildren are formed.
  • the lens moving member 40 and the lens positioning member 30 are the same as the lens
  • the guide 20 is sandwiched and rotatably supported between a front surface of the flange portion 21 of the guide 20 and a back surface of a holding plate 70 attached to the flange portion 21 via three pillars 71. It is in a state.
  • FIGS. 5 to 7. one embodiment of the movable lens unit in the bifocal camera of the present invention is shown in FIGS. 5 to 7.
  • the movable lens unit 101 is a lens barrel base fixed to the front of the camera body (not shown), 102 is fitted inside the lens barrel base 101 and slid back and forth as shown in FIG.
  • the movable lens unit is mounted as follows.
  • the main lens 50 for photographing forms a front lens unit of the photographing optical system together with the electromagnetic unit 10 and a focusing device disposed in front thereof, and the exposure and focus are performed by the control unit of the camera body. It comes under control of regulation.
  • 105 is a light-shielding frame for limiting the optical path of the main lens 50 for photographing
  • 106 is a conversion lens disposed between the electromagnetic unit 10 and the light-shielding frame 105, and its optical axis is
  • the main lens 50 for photographing is placed so as to coincide with the extension of the optical axis 103a.
  • a support member 107 holds the conversion lens 106.
  • the support member 107 is axially mounted on a mounting board (not shown) of the electromagnetic unit 10, and is urged clockwise by a torsion spring 108. However, it is also stopped by contacting the stop pin 109 planted on the mounting board.
  • Reference numeral 110 denotes a gear mounted on the support member 107 so that its rotation center is coincident with the other gear, and is meshed with another gear 111 similarly mounted on the mounting substrate.
  • Reference numeral 112 denotes a lever 1A which is integrally attached to the gear lli so that its center of rotation coincides with the gear lli, and its left end face is formed in an arc-shaped cross section.
  • a torsion spring 114 is urged in a counterclockwise direction by a torsion spring 114, and a torsion spring 114 is a torsion spring.
  • the urging force is set to be significantly smaller than that of 08 Therefore, the lever 113 stops at the position shown in the figure by the lever B 113b provided on the shaft seat 113a integrally formed therewith abutting the lever A 112 at right angles. I have.
  • the right end surface of the lever B 113b is also formed in an arcuate cross section similarly to the lever A 112, so that the operation is smoothly and accurately transmitted even when the lever B 112b is strongly pressed.
  • these members and the conversion lens 106 form a rear lens unit in the photographing optical system with respect to the above-described front lens unit.
  • the photographing optical system constitutes a long focal length system.
  • the moving rod 113 The abutment piece 113c attached to the tip of the camera body is pressed by the receiving plate 121 of the lens barrel base 101 fixed to the front of the camera body.
  • Lever B 113 b By rotating gears 111, 110 via lever A 1 12, the conversion lens 106 is largely rotated in the counterclockwise direction to rotate the conversion main lens 106. It moves from the optical path 103b of the lens 50 and retracts into the space i 02a in the movable lens unit 10'2.
  • the photographing optical system is switched to the short focal length system, and when the focal length is switched in this way, the rear lens unit is in the gap behind the electromagnetic unit 10, that is, the sectional space. Over the majority of its circumference, leaving an unused dead space 102b on the opposite circumference. Therefore, in the present invention, it is proposed to dispose a motor 60 for driving the lens, which is a power source of the focusing device, on the dead space 102b.
  • the specific position of the dead space 102b is set between the electromagnetic unit 10 and the light shielding frame 105.
  • the dead space i 02 b is located in the vicinity of the focusing device via the electromagnetic unit 10, and the motor 60 is arranged in the dead space 102 b so that the dead space i 02 b can be obtained.
  • the connection becomes easy, and the movable lens unit 102 is transferred by the focusing device, so that the connection structure becomes simple, and the automatic focusing device is incorporated. Structure.
  • the gap between the step cam 31 of the lens positioning member 30 and the groove cam 42 of the lens driving member 40 is slightly spaced. It is almost at the same time as being curved across.
  • the guy pin 51 of the photographing lens 50 is located at the lower side of the groove cam 42 at the 3 ⁇ 4 side, that is, the tip side of the light putt.
  • the regulating bin 11 When positive electricity is passed through the second movable coil member 12, the regulating bin 11 is given a movement torque in the direction of: If the nail 36 of the lens positioner 30 is prepared, release it when it is ready. That is, first, the lock of the stop nail 24 is released.
  • the photographing lens 50 recedes linearly, and at the same time, the sliding of the contact piece 35 against the printer 3 ⁇ 4 22 starts, and the rotation amount of the photographing lens 50, that is, the light
  • the number of pulses corresponding to the multi-motion amount in the ⁇ direction is transmitted from the print ⁇ ⁇ 22.
  • the power supply to the motor 60 is stopped.
  • the contact piece 35 provided on the print plate 22 and the positioning member 30 is inconsistent with the number of pulses transmitted from the print No. 22 and the number of pulses corresponding to the distance measurement result.
  • the relative positional relationship is determined in consideration of the amount of overrun that rotates until the positioning member 30 is locked.
  • the lens positioning member 30 is The guide bin 51 is guided to the front of the step cam 31 away from one of the selected steps (steps corresponding to the distance measurement result).
  • the reference numeral 51a in FIG. 2 (b) indicates the position of the guide bin 51.
  • the motor 60 starts normal rotation again, and the lens driving member 40 further rotates clockwise.
  • the pressing spring 33 attached to the lens positioning member 30 comes off the notch 48 of the lens moving member 40, and the lens driving member 40 rotates alone.
  • the photographing lens 50 is focused on the subject, and subsequently the exposure is performed by operating the first movable coil member (not shown), and the shutter is operated. Data operation is completed.
  • the motor 60 starts reverse rotation.
  • the lens driving member 40 is turned in the opposite direction.
  • the photographing lens 50 is moved forward linearly by turning the lens clockwise, and the notch i 8 becomes the lens 3 ⁇ 4.
  • the pressing member of the positioning member 30 reaches a position where it engages with the lens 33, the lens positioning member 30 is disengaged, and furthermore, the counterclockwise rotation II and the initial state m is returned. Then, the motor 60 stops.
  • the distance over which the guide 51 extends to the front of the predetermined step of the step cam 31 is a length corresponding to the distance to the subject, for example, the distance to the subject rest is long. Since it is necessary to transmit many pulses, it is difficult to move the pin 51 to the gait, and if the distance to the subject is short, only a small number of pulses need to be transmitted.
  • the guide bin 51 has a short travel distance. 'Therefore, the time required to select a given step of the step cam varies depending on the distance measurement, and this cannot be avoided.
  • the time required for the guide pin .51 to be located at the selected stage after the stage selection operation is changed in reverse to the above description based on the distance measurement result.
  • the selection time is 1: a, but the pressing time at that time is Tb.
  • the selection time is Ta '(> Ta)
  • the pressing time is set to Tb' ( ⁇ Tb) and "Ta + Tb ⁇ Ta '-Tb'., So that the time required for focusing operation is not affected by the difference in distance measurement.
  • the distance measurement connection was divided into 13 steps and the number of steps of the step cam was set to 13. If the number of pulses obtained as a result of distance measurement is in the range of 1 to 6, the pressing time of guide pin 51 is set to 7 O ms, and the number of pulses is the same. When the pressure was in the range of ⁇ 13, the pressing time was set to 50 ms, but for the sake of manufacturing and other reasons, there were only two types of pressing time. Of course, it can be set.
  • the selection mechanism for selecting the step of the step cam in accordance with the distance measurement result and the pressing machine for pressing the shooting lens to the selected step of the step force are the lens guide 2 0, lens positioning section ⁇ 30 ⁇ , lens drive * 40 , shooting pin 50, guy pin 51, and pressing spring 33, common to lens positioning lens 3 during step selection operation 0 and the lens J section movement ⁇ "A 0 is moved in a selective manner, and during the pressing operation to the selected step, the lens positioning member 30 is locked so that only the lens frame member 40 is locked.
  • the scent is increased, the present invention is not limited to this, and the selection and attachment mechanisms may be constituted by completely independent mechanisms.
  • Positioning member 30 has friction due to the union of pressure bar 33 and notch Even if a single turn occurs, the entire iU rotation angle is limited, so the lens frame 40 must be returned to the above condition and stopped after reaching the above-mentioned state. It will be.
  • the lens 50 is moved to the detection and setting operation of the stage cam 31 by the rotation of the lens 30. Since the lens drive unit 40 always occupies a position very close to the stepping force 31, the lens position determining device 30 is used. After the lens reaches the detection position and stops, the photographing lens 50 can be set to the in-focus position with a slight interruption U3 ⁇ 4 of the lens driving member 40.
  • the focus adjusting device of the present invention uses the two actuating members of the lens driving member 40 and the lens position determining member 30 as a means for performing the focusing operation of the photographing lens 50, thereby achieving high accuracy. It has the feature of being extremely durable, while having a highly durable function.
  • stop claw 24 used in such an automatic focusing device, the following function is further provided in the large invention.
  • the contour surface of the stop claw 24 on the light emitting side is the first concave 25a and the second concave from the tongue near the support 24a of the stop 24. 25b is provided, and a specific ⁇ line ⁇ connected by a protrusion 25c provided between them is formed.
  • the regulating pin 11 is connected to the stop claw 2 ⁇ .
  • the stop 24 is 3 as shown by the solid line.
  • the second movable coil 12 is turned off even if the power supply to the second movable coil is cut off! N:! : ⁇ Idle due to the tension of the Iwm2a and the tension spring 23!
  • the second movable coil .I 2 is intermittently maintained in a stable position.
  • a bistable electromagnetic device constituted by combining the stop claw 24 and the movable coil member 12 as means for controlling the lens positioning member 30 is provided. By using this, it is possible to avoid prolonged energization of the electromagnetic unit 10.
  • FIG. 10 shows a motor drive circuit.
  • M in the figure is the motor 60 in FIG. From the control circuit, preparative La Nji static TR the signal enters the terminal L,, motor M is rotated forward and conducts TR 3, preparative La Njisuta TR 2, TR 4 becomes conductive when the signal enters the terminal R Motor M reverses.
  • the distance measuring device detects the subject distance in conjunction with the operation of operating the camera release, and the information is input to the aforementioned control device.
  • a forward direction with respect to the second movable coil member 12 is previously confirmed.
  • the stop pin 24 is rotated in the clockwise direction by turning on the power A 1 in the direction .1.
  • the stop claw 24 is rotated in the counterclockwise direction to engage the claw teeth 3 6 of the lens positioning member 3 G. Perform the operation to release the stop. '. Slightly delayed from the rotation of the regulation pin 11 1, the motor SO starts to rotate counterclockwise by the energization B 1 in the positive direction, and the lens moving member 40 and the lens are rotated via the pinion 61.
  • the positioning member 30 is integrally rotated clockwise.
  • the photographing lens 50 recedes linearly, and at the same time, the slide between the contact piece 35 and the print plate 22 starts, and the position of the photographing lens is changed by a pulse signal C 1. Input to the control device.
  • the control device is set up in accordance with the distance information from A comparison with the set signal is performed, and when they match, the energization to the motor 60 is temporarily stopped, and at the same time, the energization A 2 force in the opposite direction is performed to the second movable coil member.
  • the stop claw 24 again locks the lens positioning member 30 by the counterclockwise rotation of the regulation pin 11 and stops its HI rotation, and the step cam 31 is required. Stop at the position.
  • the motor 60 resumes rotation by the forward energization B 2 again, and further rotates the lens driving member 40 clockwise, so that the engagement between the pressing spring 33 and the notch 48 is established. As a result, only the lens driving member 40 is rotated alone.
  • the guide pin 51 of the photographing lens 50 which was held at a position separated from the step cam 31 as described above by the rotation of the lens driving member 40, After the abutment lens 50 is brought into contact with a predetermined pump of the step cam 31 by the cam groove 42 and the photographing lens 50 is set at a position on the optical axis corresponding to the distance information of the distance measuring device. After a predetermined period of time, the motor 60 stops, and the operation, that is, the operation up to focusing is completed.
  • the first movable coil member (not shown) is operated, exposure is performed, and when the photographing is completed, the signal is received and the second movable coil member 1 is received. 2 is again energized in the positive direction, and the stop claw 24 is removed to release the lens positioning member 30 in the same manner as described above.
  • the reverse of the motor 6Q is started for the operation of returning the focusing device to the initial position, but in the present invention, before the reverse rotation of the motor 60 is started, first, the forward pulse application B3 is applied. Then, by continuously conducting the current B 4 in the opposite direction, a reaction torque due to inertia was applied to the motor 6 Q, and the torque was generated between the cam groove 42 and the guide bin 51. The frictional resistance was overcome and the lens body 40 was reliably returned to its initial position by reverse rotation. It is configured to obtain.
  • the effect of the pulse energization B 3 increases even if it is repeated several times continuously, and it is preferable that the pulse energization B 3 be determined according to the inclination angle of the cam groove 42.
  • the photographing lens 50 advances linearly due to the reverse rotation of the motor 60, while the lens positioning member 30 also engages with the pressing bar 33 and the notch 48 in the process. As a result, the lens driving member 0 is returned to the initial position.
  • the pulse signal C 2 is a signal generated by the contact piece 35 and the print slope 22, and the initial position of the lens driving member 0 etc. is restored. In consideration of the post-slaughter bounce, etc., after this signal has been completed and the Wakahira time has passed, the reverse rotation of the motor 60 is stopped. Industrial! Available «
  • a white motion focusing device for a turtle which is effective in compacting the lens mirror M by combining the focusing operation with the rising torque characteristic of the motor and enabling the lens mirror M to be compacted.
  • the time required for the focusing operation is substantially constant, and even when the time required for selecting the step cam is long, the overall focusing time can be shortened, and camera shake can be prevented. Generation can be effectively stopped. Also No.! As shown in (b), if the distance between the step and groove cams in the light direction differs between the short distance and the long distance, the lens will be attached on the side with the smaller distance. Since B and P are set short, it is also effective in preventing overcurrent from being applied to the motor after crucible.
  • the stop claw for removing the grandchild in order to stop or move the lens positioning member is moved forward and backward with respect to the electromagnetic device. It is possible to provide a natural focus adjustment device which can be controlled by applying a current.
  • the operation of the control member for moving the photographing lens in the focusing device, particularly, the returning operation to the initial position can be reliably performed, and thus a highly reliable focusing device can be provided. Can be provided.
  • the power transmission mechanism for driving the focus adjustment device by the power of the motor becomes simple and efficient, and furthermore, the auto-focus type two-focal point which is also effective in making the camera body compact. A camera can be realized.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

Appareil photographique pourvu d'un régulateur automatique de la netteté, composé d'un organe d'entraînement de l'objectif (40) servant à déplacer un objectif photographique (50) dans le sens de l'axe optique jusqu'à une position de netteté en fonction des informations relatives à la distance produites par un télémètre, d'un organe de positionnement d'objectif (30) servant à déterminer la position où l'objectif (50), déplacé dans le sens de l'axe optique, doit être arrêté, et d'un moteur (60) d'entraînement de ces deux organes (40), (30). Procédé de réglage automatique de la netteté consistant à détecter à l'aide d'un télémètre la distance d'un objet à photographier, à déplacer un objectif (50) dans la direction de l'axe optique en fonction des informations relatives à la distance, à déterminer, sensiblement en même temps que l'étape précédente, une position dans laquelle l'objectif (50) doit être arrêté, et à arrêter l'objectif (50) dans la position déterminée.
PCT/JP1985/000666 1984-12-04 1985-12-04 Procede de reglage automatique de la nettete et appareil photographique avec regulateur automatique de la nettete WO1986003600A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8686900235T DE3587018T2 (de) 1984-12-04 1985-12-04 Selbsttaetiges verfahren zur brennpunktregelung und kamera mit selbsttaetigen brennpunktreglern.

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP18445084U JPH0238268Y2 (fr) 1984-12-04 1984-12-04
JP59/256872 1984-12-04
JP59/184450U 1984-12-04
JP25687084A JPH0248095B2 (ja) 1984-12-04 1984-12-04 Jidoshotenkamera
JP59/256870 1984-12-04
JP25687284A JPS61133933A (ja) 1984-12-04 1984-12-04 ２焦点カメラ
JP59/258114 1984-12-05
JP25811484A JPS61134718A (ja) 1984-12-05 1984-12-05 自動焦点調節装置
JP60/88322 1985-04-23
JP8832285A JPS61245145A (ja) 1985-04-23 1985-04-23 カメラの合焦装置
JP9339485A JPS61251813A (ja) 1985-04-30 1985-04-30 自動焦点調節カメラ
JP60/93394 1985-04-30

Publications (1)

Publication Number Publication Date
WO1986003600A1 true WO1986003600A1 (fr) 1986-06-19

Family

ID=27551742

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1985/000666 WO1986003600A1 (fr) 1984-12-04 1985-12-04 Procede de reglage automatique de la nettete et appareil photographique avec regulateur automatique de la nettete

Country Status (3)

Country Link
US (1) US4841323A (fr)
EP (1) EP0207162B1 (fr)
WO (1) WO1986003600A1 (fr)

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Also Published As

Publication number Publication date
US4841323A (en) 1989-06-20
EP0207162A1 (fr) 1987-01-07
EP0207162A4 (fr) 1989-07-11
EP0207162B1 (fr) 1993-01-20

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